Nate Wooley and Ken Vandermark, both giants of current American free jazz and experimental scenes, convened as a duo in the summer of 2013. The pair issued the resulting live recordings last month as East by Northwest, a nine-track set that finds Vandermark’s saxophones and clarinet and Wooley’s trumpet to be wonderfully expressive partners. They both have the ability to be plaintive and brooding or spastic and restless, qualities that make their navigations of even very familiar pieces feel invigorated. A weekend dance club, Neptune’s is becoming one of the Triangle’s better weeknight listening rooms thanks to engagements just like this. —Grayson Haver Currin